Media Server / SLP Duplication Question
I'm curious about how NetBackup decides which media servers should be used for SLP duplications.
We have 2 Data Domains which we back up to, with a total of 4 media servers; these servers are then grouped in load balanced pairs. Generally our policies are set up so that one pair writes backups to one Data Domain while the other pair deal with the backups for the other Data Domain. However, all 4 media servers can access both Data Domains.
Looking at many of our SLP duplication jobs, the "Media server" listed in the detailed status is something along the lines of:
"exampleserver1 -> exampleserver2" (with each server being from a different pair as described above)
However, I have noticed that when the environment is busy overnight, any running SLP duplications often use the same server to read and write the image (e.g. "exampleserver2 -> exampleserver2"). Is this simply because the other servers are busier so NetBackup doesn't assign two different media servers for the duplication job?